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the rpm speed of the engine shall be measured by means of an independent instrument, e.g. a roller bed and a tachometer.
apgriezienu skaitu minūtē mēra ar atsevišķu ierīci, piemēram, cilindriem aprīkotu darbagaldu un tahometru.
the speed of the motorcycle or motor tricycle is measured by means of a precision tachometer or deduced from measuring the time over a given distance on a flat dry road in both directions with the stop closed.
motocikla vai mototricikla ātrumu mēra ar tahometru vai izsecina, mērot laiku noteiktā attālumā uz līdzena un sausa ceļa abos virzienos ar noslēgtu aizturi.